Conduit fitting



Patented Mar. 10, 1931 PtlTED STATES PATENT @FFICE ELIVIER J. S. SVANSON, OF ERIE, PENNSYLVANIA, ASSIGNOR TO ERIE Iv'IALLEABLE IRON COMPANY, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

CON DUI'I FITTING Application filed August 7, 1928.

In theuse of conduit fittings it is frequently desirable to reduce the size of the opening of the fitting so as to connect it with a smaller conduit than the opening to the 5 fitting. The present invention is designed to accomplish this purpose with relation to fittings designed for use with threadless conduits. Examples of such fittings are illustrated in the applications of Howard A. Se lah, #743,629, filed Oct. 14th, 1924: issued as Patent No. 1,597,486, dated Aug. 24, 1926, and #23348, filed Apr. 15th, 1925, issued as Patent No. 1,683,413, dated Sept. 4, 1928.

' In carrying out the invention a reducing 5 element, or fitting is utilized. This ordinarily is a member adapted to be secured to the body of a fitting having an opening adapted to receive a securing means for a threadless conduit. As shown in said application and 2G ordinarily also the reducing member is designed to secure a threadless conduit. The present invention, however, is not limited in its broader phases to the inclusion of both such connections, that is, between the fitting and reducer and the reducer and the securing means. Features and details of the invention will appear from the specification and claims.

The invention is illustrated in the accompanying drawings as follows Fig.1 shows an elevation, partly in section, on the line 11 in F 3.

Fig. 2 an elevation, partly in section, on the line 22 in Fig. 3. 1

Fig. 3 a section on the line 33 in Fig. 2.

Fig. A an elevation, partly in section, of the reducing member.

1 marks the body of the fitting which, as shown, is in the form of a conduit box. It will be understood, however, that the invention is not limited to this particular fitting. The body of the fitting has anextension 2 with an interior tapered opening 3, and is provided with out'of round portions, or flats 4.

A reducing member 5 has a tapered surface 6 adapted to contact with wedging engagement the surface 3. It is provided with flats 7 conforming to the flats 1. The mem- KO her is provided with screw threads 8 and a nut 9 is arranged on these screw threads Serial No. 127,805.

drawing the member into wedging engagement in the opening in the extension 2. The nterior of the reducing member has wedging surfaces 10 and flats 11 corresponding to the wedging surfaces 3 and 1.

Arranged within the reducing member is a contractible sleeve 12. This sleeve is provided with the wedge surfaces 13 engaging the wedge surfaces 10 and with flats 1 1 c0nforming to the flats l1 preventing the sleeve from turning. The contractible sleeve has alongitudinal slot 15 and an inwardly extending guard lip 16 at its inner end. The sleeve is adapted to receive a conduit A and the guard lip 16 to guard the end of the conduit. The sleeve is provided with a circumferential slot 17 between the guard lip 16 and the body of the sleeve, thus permitting the sleeve to readily contract as the sleeve is drawn into wedging engagement with the inner surface of the reducing member. The sleeve has ex ternal threads at its outer end and a nut 18 is arranged on these threads and is adapted to draw the sleeve into the reducing member so as to contract it into clamping engage ment with an inserted conduit.

It will be observed that the sleeve 12 is of a shape that if engaged would readily fit in the opening in the extension operating upon the wedged surfaces 3in other words, the conduit fitting 1 with its extension is adapted to receive directly a contractible sleeve such as the sleeve 12 and to operate directly under these circumstances upon a larger conduit than the conduit A and the present mechanism provides a reducing member for such a fitting. Further the reducing member permits of the use of a securing means for'the conduit adapted to secure a threadless conduit. Thus in the preferable form as shown the fitting is adapted to receive a securing means for a threadless conduit and the reducing member is also so adapted.

What I claim as new is 1. A conduit fitting comprising a body member having a conduit opening adapted to receive a threadless conduit securing means; a reducing member having an opening leading to the body opening, the reducing memher opening being adapted to receive a threadhaving threads atits outer end and a nut on the sleeve. V

2. A conduit fitting comprising a body member having a conduit opening adapted to receive a threadless conduit securing ,,means; a reducingmember 1n the opening with thecontacting surfaces in wedging engagement means forcing the reducing memfiber endwiseto force the members into wedg- 5mg engagement; and'means in the reducing member vfor securing a conduit.

. 3. A conduit fitt ng comprlsing a body member having a conduit opening adapted to receive athreadlessconduit securing means;

areducing member in the opening with the contacting surfaces in wedging engagement;

N means forcing thereducing member endwise 7 (to force tlielmembers into wedging engagemerit, the innerendof the reducing member .beingjthe' larger; and meansin the reducing member for securing a conduit.

"4..A .-conduit-fitting comprising a body Q-memb er having a conduit opening adapted to receive a threadless conduit securing assmeans; areduci-ng member arrangedin said opening with the contacting surfaces in -wedg1ng. engagement, said reducing member f'having an openingadapted toreceive the corn ,-.du;i-t securing means; means forcing the re ,ducing member'endwise to force the members into wedging engagement; athreadless conduit securing meansarranged in the reducing member opening comprising a slotted sleeve in wedging engagement with the walls .ojf'the reducing member; and means for forc ing the slottedsleeveendwise to contract the sam 7 5 A conduit fitting comprising a: body ;memberhaving a conduit opening adapted to .50 receive a threadless conduit securing .means a reducing member arranged in said opening member having a conduit opening adapted to receive a threadless conduit securing means; a reducing member arranged in said opening with the contacting surfaces in wedging engagement, said reducing member having an opening adapted to receive the conduit securing means; means forcing the reducing member endwise to force the members into wedging engagement; a threadless conduit securing means arrangedin thereducing member opening comprising a slotted sleevein Wedging engagement with the walls of the reduc- "ing member; and means for forcing the slotted sleeve endwise to contract the same, the inner ends of'both-the reducing member and the contractible sleevebeing the larger. 7

7. A conduit fitting in theformof atube having an outer wedgingsurface adapted for wedging engagement with' the walls of an outlet opening, an inner wedging surface adapted for wedging engagement with a con du t clampmg sleeve, and a screw thread at one end. I

8. A conduit fitting comprising an adapter in-th'e formofa tube having tapered wedging outer and inner surfaces, and a screw'thread at one end. V

r 9. A conduit fitting comprising a body member having a conduit opening with an out of round portion therein; a reducing member having an out of round portion adapted to engage the wallsof the out-of round portion of the body opening, said reducing member having an opening leading to the body opening, the .reducing member opening" having a portion thereof out of round and adapted to receive a threadless c0nduit securing means; a securing means in the reducing memberopening comprising a slotted'sleeve havingwedging surfaces adapted toengage the inner walls of the reducing -member and having out of round portions'in register with and engaging the out of round portions of the opening in the reducing memher to lock the sleeve "against turning; and means exerting axial thrust on the sleeve.

' In testimony whereof Iihave' hereunto'set my hand. v

ELMER J. S. SWVANSQN.

with the contacting surfaces in wedging engagement, said reducing member having an open ng adapted to rece ve the conduit securing means means forcing the reducing member endwise to force, the members into wedging engagement .-a threadless conduit securing means arranged in the reducing member openingvcomprising a slottedsleeve ,c'o in-wedging engagement with the walls of the :reducingmember; and means for forcing the slotted sleeve endwise to'contract the same,

the inner end of the'contractible sleeve being "the: larger.

V vv 6.-i k conduit fitting'comprising 'a'body 

